According to this , drag racing orientated, article a big enough forward facing scoop can add up to 20% power at very high speeds.
https://www.enginela...cing-air-inlet/
It seems to go against all the "use a naca duct" advice in road racing and does'nt take account of the large scoop drag.
However , ever since the Drag racing world got hold of real time propshaft torque measurement and proved a top fuel engine does give 10,000 hp pus I have been wary of decrying drag racing stuff.
Any thoughts?